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Haryana PMT Haryana PMT Solved Paper-2001

  • question_answer
    A radioactive element has a half-life of one day. After three days the amount of the element left will be:

    A)  \[\frac{1}{16}\]of the original

    B)  \[\frac{1}{8}\] of the original

    C)  \[\frac{1}{4}\] of the original

    D)  \[\frac{1}{2}\] of the original

    Correct Answer: B

    Solution :

                    Number of half lives \[n=\frac{3}{1}=3\] Amount left \[=\frac{1}{{{2}^{3}}}=\frac{1}{8}\]


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